An opportunity to look up a fact on Wikipedia. Wikitunities often occur in the context of settling a dispute, or enhancing a conversation with friends. See also googletunity.

Friend 1 "Mitt Romney's first name is Mitten."
Friend 2 "What?! No way. That's ridiculous."
Friend 1 "Oh really? Then what's his first name?"
Friend 2 "I don't know, but I know it's not Mitten. Let's take this wikitunity to find out the truth."